1 Formulae

• Helium (He) is monatomic
• Neon (Ne) is monatomic
• Argon (Ar) is monatomic
• Krypton (Kr) is monatomic
• Xenon (Xe) is monatomic
• Radon (Rn) is monatomic
• Hydrogen (H2) is simple molecular
• Nitrogen (N2) is simple molecular
• Oxygen (O2) is simple molecular
• Fluorine (F2) is simple molecular
• Chlorine (Cl2) is simple molecular
• Bromine (Br2) is simple molecular
• Iodine (I2) is simple molecular
• Phosphorus (P4) is simple molecular
• Sulphur (S8) is simple molecular
• Hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, iodine are described as diatomic
• There are no Ionic elements
• The formula for metallic elements is just the symbol
• Magnesium (Mg) is metallic
• Iron (Fe) is metallic
• Sodium (Na) is metallic
• Nickel (Ni) is metallic
• The formula for giant covalent is just the symbol
• Diamond (C) is giant covalent
• Graphite (C) is giant covalent
• Graphine (C) is giant covalent
• Silicon (Si) is giant covalent
• There are no monatomic compounds
• Carbon dioxide (CO2) is simple molecular compound
• Carbon monoxide (CO) is a simple molecular compound
• Nitrogen monoxide (NO) is a simple molecular compound
• Nitrogen dioxide (NO2) is a simple molecular compound
• Sulphur dioxide (SO2) is a simple molecular compound
• Sulphur trioxide (SO3) is a simple molecular compound
• Ammonia (NH3) is a simple molecular compound
• Methane (CH4) is a simple molecular compound
• Hydrogen sulfide (H2S) is a simple molecular compound
• Ionic compounds have to be worked out using ion charges
• Hydrochloric acid (HCL) is an ionic compound
• Sulphuric acid (H2SO4) is an ionic compound